Combining Ability and Gene Action for Yield Characteristics in Novel Aromatic Cytoplasmic Male Sterile Hybrid Rice under Water-Stress Conditions

Hybrid rice parental lines with better combining abilities provide an efficient tool to increase production. In the current study, twenty hybrid combinations were generated from five aromatic cytoplasmic male sterile (CMS) and four restorer (three of them aromatic) using a line × tester mating design. The hybrids their evaluated under two water regimes: normal irrigation water-stress. Ten yield-component traits studied over period 2 years, significant differences between parents are reported in this investigation. Overall, all yield component significantly affected by deficit governed both additive non-additive gene actions. More specifically, grain (GY) was mainly controlled action water-stress conditions. contribution variance (?2 A) more prominent genetic components as compared dominance D). CMS IR58025A PR2 recorded best combiners for GY good many other characteristics growth cross Pusa12A/IR25571-31R Pusa12A/Giza-Basmati-201 revealed positive specific ability (SCA) effects inconsistent correlation general (GCA) SCA manifested complex interactions among negative alleles genes controlling traits. Generally, findings investigation demonstrated importance GCA understanding actions new lines. Therefore, we recommend considering these selection elite developing superior varieties